fixes no response being send on download

[KreutzerCode]

After updating to version 1.3.1, no file download response was triggered when calling the download function, which may result in empty pdf files #31.

This is due to the new use of the "Illuminate\Http\Response" class inside of the download method.

        $output = $this->output();
        return new Response($output, 200, [
            'Content-Type' => 'application/pdf',
            'Content-Disposition' =>  'attachment; filename="' . $this->fileName . '"',
            'Content-Length' => strlen($output),
        ]);

The reason for the problem is that the response is generated and returned but not sent. To do this, we have to call the send method of the response class.

        $output = $this->output();
        $response = new Response($output, 200, [
            'Content-Type' => 'application/pdf',
            'Content-Disposition' =>  'attachment; filename="' . $this->fileName . '"',
            'Content-Length' => strlen($output),
        ]);
        return $response->send();

This solves the problem!
(tested on laravel 9)

[wblondel]

Hi @Webklex , can we merge this?

[ankheur]

I got the problem this commit fixes ! Empty blank page when I tried to use the download() method.
Thanks a lot for this fix, hope it gets merged soon